Some Tips for you guys :)

Here's some tips for you peoples when using Windows, it doesnt matter whether you use XP or Vista or 7.

Basic Tips:

Turn off User Account Control (UAC) (Vista and 7 users.). There are alot, ALOT of complains out there about Vista's Allow/Cancel thingy, which is very annoying sometimes and because it identifies your apps that requires admin's permission, sometimes it tend to scan the whole executable! which means if you downloaded a 1GB file, it takes a long time to scan through it, and by the time it's scanning the PC seems "freeze" and sometimes users will be annoyed because most of them dont know it's all about UAC and thought Vista is a crap OS, lags and doesnt launch most of the apps! UAC sometimes annoys peoples, but it does enhance the whole OS (Operating System)'s security. IMO most of you peoples should turn this off, it makes your life easier (LOL). To turn UAC off, just go to Control Panel, User Accounts & Family Safety (something like that because 7 has a different control panel than vista) and User Accounts, then click:
Vista: click Turn on/off User Account Control and untick the Box and restart your PC.
7: click Change User Account Control settings and drag the slider all the way down and press OK and restart your PC.

Disabling Aero:
Aero is introduced when Vista (in codename "Longhorn") is announced, it adds a transparency effect to your taskbar and windows, it does make the whole OS looked alot better but many PC's out there that didn't came with a graphics card or a low spec PC will suffer lags and stutters when Aero is enabled due to it's 3D transparency effect. Turning it off will get quite a big performance boost on your PC, especially those PCs that uses integrated Graphics Chipset. Many people out there experienced a big performance boost when comparing Windows Vista's Aero and Windows 7's Aero, this is because Windows 7 uses OpenGL for Aero rendering which minimises the stress of graphics card. :D

Turn Off Aero in Vista:
On desktop, right click and choose Personalize. Then click Windows Color and Appearance, then click Open classic appearance properties for more color options, then choose Windows Vista Basic and click apply then OK, that should disable Aero altogether.

Turn Off Aero in Windows 7:
On desktop, right click and choose Personalize. Then scroll down and choose Windows 7 Basic theme.

When you use an outdated application, most of them will not run on Windows Vista/7, you can try right clicking the app, and choose properties. Then go to Compatibility Tab and run the program in Pre-Windows settings.

Update your drivers frequently, sometimes new drivers will improve stability on Software/Hardware's Performance, especially graphics card drivers.
Intel - http://downloadcenter.intel.com/Default.aspx
ATI - http://www.amd.com/uk/Pages/AMDHomePage.aspx
nVIDIA- http://www.nvidia.com/page/home.html
Realtek - http://www.realtek.com.tw/DOWNLOADS/
etc.

Alot of peoples sometimes get a message "Your PC is not geniune, etc.", and most of them just send them to format. Well I suggest turn OFF Automatic Updates! Most of these problems come with Updates from microsoft that scans your PC to identify whether your PC's Windows is original. OEM PC users out there dont have to worry, you can just leave it ON because you are having original Windows UNLESS you send your PC to reformat before.

Keep your PC clean. Sometimes, reapplying thermal paste on your PC's heatsink will decrease it's temperature. Clean your PC after 2-3 months a time, its recommended to leave your PC clean and cool. Dusts tend to block case's airflow and decreases cooling efficeincy. Dust also tend to store on Fans and Graphic Card's Fan & Heatsink. So clean them when you are free. Vacuuming also work, sometimes detaching your PC's front panel and clean it's air filter (if there is).

Run Disk Cleanup and Disk Defragmenter. When Apps have been opened, there will be Temporary files left on your PC's Temp folder, same happens to web browsers, they store the pics and stuffs on your PC so next time when you visit the site again, it just loads the datas from your PC to improve the speed of web browsing. Cleaning these files will free up some space on your PC. Just run Disk Cleanup and tick everything and let it do the job. Disk Defragmenter..its..well kinda hard to explain how this thing works BUT it does increase your PC's perofmrance, you need to run it one in awhile.

"Windows cannot find d3dx9_xx.dll" something similar like this. This can be fixed on updating your PC's DirectX, just grab it off from Microsoft's site. (make sure there is no validation needed or else you will get the windows not genuine thingy again).

Some common stuffs to do after a PC's being reformated:
1. Install latest drivers
2. Install latest DirectX Redist.
3. Turn off UAC and Automatic Updates
4. Install Visual C++ Redist. (sometimes games doesnt run because of this)
5. Install .Net Framework 2.0
6. Install WinRAR (For decompressing RAR/Zip/ISO etc etc)
7. Install Anti-Virus and Anti-Spyware
8. Install K-Lite Mega Codec Pack (You dont need RealPlayer or new players to play RMVB or other formats)

More tips coming :D